1 /* $NetBSD: compat.c,v 1.14 1996/11/06 17:59:01 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. 5 * Copyright (c) 1988, 1989 by Adam de Boor 6 * Copyright (c) 1989 by Berkeley Softworks 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * Adam de Boor. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)compat.c 8.2 (Berkeley) 3/19/94"; 44 #else 45 static char rcsid[] = "$NetBSD: compat.c,v 1.14 1996/11/06 17:59:01 christos Exp $"; 46 #endif 47 #endif /* not lint */ 48 49 /*- 50 * compat.c -- 51 * The routines in this file implement the full-compatibility 52 * mode of PMake. Most of the special functionality of PMake 53 * is available in this mode. Things not supported: 54 * - different shells. 55 * - friendly variable substitution. 56 * 57 * Interface: 58 * Compat_Run Initialize things for this module and recreate 59 * thems as need creatin' 60 */ 61 62 #include <stdio.h> 63 #include <sys/types.h> 64 #include <sys/stat.h> 65 #include <sys/wait.h> 66 #include <ctype.h> 67 #include <errno.h> 68 #include <signal.h> 69 #include "make.h" 70 #include "hash.h" 71 #include "dir.h" 72 #include "job.h" 73 extern int errno; 74 75 /* 76 * The following array is used to make a fast determination of which 77 * characters are interpreted specially by the shell. If a command 78 * contains any of these characters, it is executed by the shell, not 79 * directly by us. 80 */ 81 82 static char meta[256]; 83 84 static GNode *curTarg = NILGNODE; 85 static GNode *ENDNode; 86 static void CompatInterrupt __P((int)); 87 static int CompatRunCommand __P((ClientData, ClientData)); 88 static int CompatMake __P((ClientData, ClientData)); 89 90 /*- 91 *----------------------------------------------------------------------- 92 * CompatInterrupt -- 93 * Interrupt the creation of the current target and remove it if 94 * it ain't precious. 95 * 96 * Results: 97 * None. 98 * 99 * Side Effects: 100 * The target is removed and the process exits. If .INTERRUPT exists, 101 * its commands are run first WITH INTERRUPTS IGNORED.. 102 * 103 *----------------------------------------------------------------------- 104 */ 105 static void 106 CompatInterrupt (signo) 107 int signo; 108 { 109 GNode *gn; 110 111 if ((curTarg != NILGNODE) && !Targ_Precious (curTarg)) { 112 char *p1; 113 char *file = Var_Value (TARGET, curTarg, &p1); 114 115 if (!noExecute && eunlink(file) != -1) { 116 printf ("*** %s removed\n", file); 117 } 118 if (p1) 119 free(p1); 120 121 /* 122 * Run .INTERRUPT only if hit with interrupt signal 123 */ 124 if (signo == SIGINT) { 125 gn = Targ_FindNode(".INTERRUPT", TARG_NOCREATE); 126 if (gn != NILGNODE) { 127 Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn); 128 } 129 } 130 131 } 132 exit (signo); 133 } 134 135 /*- 136 *----------------------------------------------------------------------- 137 * CompatRunCommand -- 138 * Execute the next command for a target. If the command returns an 139 * error, the node's made field is set to ERROR and creation stops. 140 * 141 * Results: 142 * 0 if the command succeeded, 1 if an error occurred. 143 * 144 * Side Effects: 145 * The node's 'made' field may be set to ERROR. 146 * 147 *----------------------------------------------------------------------- 148 */ 149 static int 150 CompatRunCommand (cmdp, gnp) 151 ClientData cmdp; /* Command to execute */ 152 ClientData gnp; /* Node from which the command came */ 153 { 154 char *cmdStart; /* Start of expanded command */ 155 register char *cp; 156 Boolean silent, /* Don't print command */ 157 errCheck; /* Check errors */ 158 int reason; /* Reason for child's death */ 159 int status; /* Description of child's death */ 160 int cpid; /* Child actually found */ 161 ReturnStatus stat; /* Status of fork */ 162 LstNode cmdNode; /* Node where current command is located */ 163 char **av; /* Argument vector for thing to exec */ 164 int argc; /* Number of arguments in av or 0 if not 165 * dynamically allocated */ 166 Boolean local; /* TRUE if command should be executed 167 * locally */ 168 char *cmd = (char *) cmdp; 169 GNode *gn = (GNode *) gnp; 170 171 /* 172 * Avoid clobbered variable warnings by forcing the compiler 173 * to ``unregister'' variables 174 */ 175 #if __GNUC__ 176 (void) &av; 177 (void) &errCheck; 178 #endif 179 silent = gn->type & OP_SILENT; 180 errCheck = !(gn->type & OP_IGNORE); 181 182 cmdNode = Lst_Member (gn->commands, (ClientData)cmd); 183 cmdStart = Var_Subst (NULL, cmd, gn, FALSE); 184 185 /* 186 * brk_string will return an argv with a NULL in av[1], thus causing 187 * execvp to choke and die horribly. Besides, how can we execute a null 188 * command? In any case, we warn the user that the command expanded to 189 * nothing (is this the right thing to do?). 190 */ 191 192 if (*cmdStart == '\0') { 193 free(cmdStart); 194 Error("%s expands to empty string", cmd); 195 return(0); 196 } else { 197 cmd = cmdStart; 198 } 199 Lst_Replace (cmdNode, (ClientData)cmdStart); 200 201 if ((gn->type & OP_SAVE_CMDS) && (gn != ENDNode)) { 202 (void)Lst_AtEnd(ENDNode->commands, (ClientData)cmdStart); 203 return(0); 204 } else if (strcmp(cmdStart, "...") == 0) { 205 gn->type |= OP_SAVE_CMDS; 206 return(0); 207 } 208 209 while ((*cmd == '@') || (*cmd == '-')) { 210 if (*cmd == '@') { 211 silent = TRUE; 212 } else { 213 errCheck = FALSE; 214 } 215 cmd++; 216 } 217 218 while (isspace((unsigned char)*cmd)) 219 cmd++; 220 221 /* 222 * Search for meta characters in the command. If there are no meta 223 * characters, there's no need to execute a shell to execute the 224 * command. 225 */ 226 for (cp = cmd; !meta[(unsigned char)*cp]; cp++) { 227 continue; 228 } 229 230 /* 231 * Print the command before echoing if we're not supposed to be quiet for 232 * this one. We also print the command if -n given. 233 */ 234 if (!silent || noExecute) { 235 printf ("%s\n", cmd); 236 fflush(stdout); 237 } 238 239 /* 240 * If we're not supposed to execute any commands, this is as far as 241 * we go... 242 */ 243 if (noExecute) { 244 return (0); 245 } 246 247 if (*cp != '\0') { 248 /* 249 * If *cp isn't the null character, we hit a "meta" character and 250 * need to pass the command off to the shell. We give the shell the 251 * -e flag as well as -c if it's supposed to exit when it hits an 252 * error. 253 */ 254 static char *shargv[4] = { "/bin/sh" }; 255 256 shargv[1] = (errCheck ? "-ec" : "-c"); 257 shargv[2] = cmd; 258 shargv[3] = (char *)NULL; 259 av = shargv; 260 argc = 0; 261 } else { 262 /* 263 * No meta-characters, so no need to exec a shell. Break the command 264 * into words to form an argument vector we can execute. 265 * brk_string sticks our name in av[0], so we have to 266 * skip over it... 267 */ 268 av = brk_string(cmd, &argc, TRUE); 269 av += 1; 270 } 271 272 local = TRUE; 273 274 /* 275 * Fork and execute the single command. If the fork fails, we abort. 276 */ 277 cpid = vfork(); 278 if (cpid < 0) { 279 Fatal("Could not fork"); 280 } 281 if (cpid == 0) { 282 if (local) { 283 execvp(av[0], av); 284 (void) write (2, av[0], strlen (av[0])); 285 (void) write (2, ": not found\n", sizeof(": not found")); 286 } else { 287 (void)execv(av[0], av); 288 } 289 exit(1); 290 } 291 free(cmdStart); 292 Lst_Replace (cmdNode, (ClientData) NULL); 293 294 /* 295 * The child is off and running. Now all we can do is wait... 296 */ 297 while (1) { 298 299 while ((stat = wait(&reason)) != cpid) { 300 if (stat == -1 && errno != EINTR) { 301 break; 302 } 303 } 304 305 if (stat > -1) { 306 if (WIFSTOPPED(reason)) { 307 status = WSTOPSIG(reason); /* stopped */ 308 } else if (WIFEXITED(reason)) { 309 status = WEXITSTATUS(reason); /* exited */ 310 if (status != 0) { 311 printf ("*** Error code %d", status); 312 } 313 } else { 314 status = WTERMSIG(reason); /* signaled */ 315 printf ("*** Signal %d", status); 316 } 317 318 319 if (!WIFEXITED(reason) || (status != 0)) { 320 if (errCheck) { 321 gn->made = ERROR; 322 if (keepgoing) { 323 /* 324 * Abort the current target, but let others 325 * continue. 326 */ 327 printf (" (continuing)\n"); 328 } 329 } else { 330 /* 331 * Continue executing commands for this target. 332 * If we return 0, this will happen... 333 */ 334 printf (" (ignored)\n"); 335 status = 0; 336 } 337 } 338 break; 339 } else { 340 Fatal ("error in wait: %d", stat); 341 /*NOTREACHED*/ 342 } 343 } 344 345 return (status); 346 } 347 348 /*- 349 *----------------------------------------------------------------------- 350 * CompatMake -- 351 * Make a target. 352 * 353 * Results: 354 * 0 355 * 356 * Side Effects: 357 * If an error is detected and not being ignored, the process exits. 358 * 359 *----------------------------------------------------------------------- 360 */ 361 static int 362 CompatMake (gnp, pgnp) 363 ClientData gnp; /* The node to make */ 364 ClientData pgnp; /* Parent to abort if necessary */ 365 { 366 GNode *gn = (GNode *) gnp; 367 GNode *pgn = (GNode *) pgnp; 368 if (gn->type & OP_USE) { 369 Make_HandleUse(gn, pgn); 370 } else if (gn->made == UNMADE) { 371 /* 372 * First mark ourselves to be made, then apply whatever transformations 373 * the suffix module thinks are necessary. Once that's done, we can 374 * descend and make all our children. If any of them has an error 375 * but the -k flag was given, our 'make' field will be set FALSE again. 376 * This is our signal to not attempt to do anything but abort our 377 * parent as well. 378 */ 379 gn->make = TRUE; 380 gn->made = BEINGMADE; 381 Suff_FindDeps (gn); 382 Lst_ForEach (gn->children, CompatMake, (ClientData)gn); 383 if (!gn->make) { 384 gn->made = ABORTED; 385 pgn->make = FALSE; 386 return (0); 387 } 388 389 if (Lst_Member (gn->iParents, pgn) != NILLNODE) { 390 char *p1; 391 Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn); 392 if (p1) 393 free(p1); 394 } 395 396 /* 397 * All the children were made ok. Now cmtime contains the modification 398 * time of the newest child, we need to find out if we exist and when 399 * we were modified last. The criteria for datedness are defined by the 400 * Make_OODate function. 401 */ 402 if (DEBUG(MAKE)) { 403 printf("Examining %s...", gn->name); 404 } 405 if (! Make_OODate(gn)) { 406 gn->made = UPTODATE; 407 if (DEBUG(MAKE)) { 408 printf("up-to-date.\n"); 409 } 410 return (0); 411 } else if (DEBUG(MAKE)) { 412 printf("out-of-date.\n"); 413 } 414 415 /* 416 * If the user is just seeing if something is out-of-date, exit now 417 * to tell him/her "yes". 418 */ 419 if (queryFlag) { 420 exit (-1); 421 } 422 423 /* 424 * We need to be re-made. We also have to make sure we've got a $? 425 * variable. To be nice, we also define the $> variable using 426 * Make_DoAllVar(). 427 */ 428 Make_DoAllVar(gn); 429 430 /* 431 * Alter our type to tell if errors should be ignored or things 432 * should not be printed so CompatRunCommand knows what to do. 433 */ 434 if (Targ_Ignore (gn)) { 435 gn->type |= OP_IGNORE; 436 } 437 if (Targ_Silent (gn)) { 438 gn->type |= OP_SILENT; 439 } 440 441 if (Job_CheckCommands (gn, Fatal)) { 442 /* 443 * Our commands are ok, but we still have to worry about the -t 444 * flag... 445 */ 446 if (!touchFlag) { 447 curTarg = gn; 448 Lst_ForEach (gn->commands, CompatRunCommand, (ClientData)gn); 449 curTarg = NILGNODE; 450 } else { 451 Job_Touch (gn, gn->type & OP_SILENT); 452 } 453 } else { 454 gn->made = ERROR; 455 } 456 457 if (gn->made != ERROR) { 458 /* 459 * If the node was made successfully, mark it so, update 460 * its modification time and timestamp all its parents. Note 461 * that for .ZEROTIME targets, the timestamping isn't done. 462 * This is to keep its state from affecting that of its parent. 463 */ 464 gn->made = MADE; 465 #ifndef RECHECK 466 /* 467 * We can't re-stat the thing, but we can at least take care of 468 * rules where a target depends on a source that actually creates 469 * the target, but only if it has changed, e.g. 470 * 471 * parse.h : parse.o 472 * 473 * parse.o : parse.y 474 * yacc -d parse.y 475 * cc -c y.tab.c 476 * mv y.tab.o parse.o 477 * cmp -s y.tab.h parse.h || mv y.tab.h parse.h 478 * 479 * In this case, if the definitions produced by yacc haven't 480 * changed from before, parse.h won't have been updated and 481 * gn->mtime will reflect the current modification time for 482 * parse.h. This is something of a kludge, I admit, but it's a 483 * useful one.. 484 * 485 * XXX: People like to use a rule like 486 * 487 * FRC: 488 * 489 * To force things that depend on FRC to be made, so we have to 490 * check for gn->children being empty as well... 491 */ 492 if (!Lst_IsEmpty(gn->commands) || Lst_IsEmpty(gn->children)) { 493 gn->mtime = now; 494 } 495 #else 496 /* 497 * This is what Make does and it's actually a good thing, as it 498 * allows rules like 499 * 500 * cmp -s y.tab.h parse.h || cp y.tab.h parse.h 501 * 502 * to function as intended. Unfortunately, thanks to the stateless 503 * nature of NFS (and the speed of this program), there are times 504 * when the modification time of a file created on a remote 505 * machine will not be modified before the stat() implied by 506 * the Dir_MTime occurs, thus leading us to believe that the file 507 * is unchanged, wreaking havoc with files that depend on this one. 508 * 509 * I have decided it is better to make too much than to make too 510 * little, so this stuff is commented out unless you're sure it's 511 * ok. 512 * -- ardeb 1/12/88 513 */ 514 if (noExecute || Dir_MTime(gn) == 0) { 515 gn->mtime = now; 516 } 517 if (gn->cmtime > gn->mtime) 518 gn->mtime = gn->cmtime; 519 if (DEBUG(MAKE)) { 520 printf("update time: %s\n", Targ_FmtTime(gn->mtime)); 521 } 522 #endif 523 if (!(gn->type & OP_EXEC)) { 524 pgn->childMade = TRUE; 525 Make_TimeStamp(pgn, gn); 526 } 527 } else if (keepgoing) { 528 pgn->make = FALSE; 529 } else { 530 printf ("\n\nStop.\n"); 531 exit (1); 532 } 533 } else if (gn->made == ERROR) { 534 /* 535 * Already had an error when making this beastie. Tell the parent 536 * to abort. 537 */ 538 pgn->make = FALSE; 539 } else { 540 if (Lst_Member (gn->iParents, pgn) != NILLNODE) { 541 char *p1; 542 Var_Set (IMPSRC, Var_Value(TARGET, gn, &p1), pgn); 543 if (p1) 544 free(p1); 545 } 546 switch(gn->made) { 547 case BEINGMADE: 548 Error("Graph cycles through %s\n", gn->name); 549 gn->made = ERROR; 550 pgn->make = FALSE; 551 break; 552 case MADE: 553 if ((gn->type & OP_EXEC) == 0) { 554 pgn->childMade = TRUE; 555 Make_TimeStamp(pgn, gn); 556 } 557 break; 558 case UPTODATE: 559 if ((gn->type & OP_EXEC) == 0) { 560 Make_TimeStamp(pgn, gn); 561 } 562 break; 563 default: 564 break; 565 } 566 } 567 568 return (0); 569 } 570 571 /*- 572 *----------------------------------------------------------------------- 573 * Compat_Run -- 574 * Initialize this mode and start making. 575 * 576 * Results: 577 * None. 578 * 579 * Side Effects: 580 * Guess what? 581 * 582 *----------------------------------------------------------------------- 583 */ 584 void 585 Compat_Run(targs) 586 Lst targs; /* List of target nodes to re-create */ 587 { 588 char *cp; /* Pointer to string of shell meta-characters */ 589 GNode *gn = NULL;/* Current root target */ 590 int errors; /* Number of targets not remade due to errors */ 591 592 if (signal(SIGINT, SIG_IGN) != SIG_IGN) { 593 signal(SIGINT, CompatInterrupt); 594 } 595 if (signal(SIGTERM, SIG_IGN) != SIG_IGN) { 596 signal(SIGTERM, CompatInterrupt); 597 } 598 if (signal(SIGHUP, SIG_IGN) != SIG_IGN) { 599 signal(SIGHUP, CompatInterrupt); 600 } 601 if (signal(SIGQUIT, SIG_IGN) != SIG_IGN) { 602 signal(SIGQUIT, CompatInterrupt); 603 } 604 605 for (cp = "#=|^(){};&<>*?[]:$`\\\n"; *cp != '\0'; cp++) { 606 meta[(unsigned char) *cp] = 1; 607 } 608 /* 609 * The null character serves as a sentinel in the string. 610 */ 611 meta[0] = 1; 612 613 ENDNode = Targ_FindNode(".END", TARG_CREATE); 614 /* 615 * If the user has defined a .BEGIN target, execute the commands attached 616 * to it. 617 */ 618 if (!queryFlag) { 619 gn = Targ_FindNode(".BEGIN", TARG_NOCREATE); 620 if (gn != NILGNODE) { 621 Lst_ForEach(gn->commands, CompatRunCommand, (ClientData)gn); 622 if (gn->made == ERROR) { 623 printf("\n\nStop.\n"); 624 exit(1); 625 } 626 } 627 } 628 629 /* 630 * For each entry in the list of targets to create, call CompatMake on 631 * it to create the thing. CompatMake will leave the 'made' field of gn 632 * in one of several states: 633 * UPTODATE gn was already up-to-date 634 * MADE gn was recreated successfully 635 * ERROR An error occurred while gn was being created 636 * ABORTED gn was not remade because one of its inferiors 637 * could not be made due to errors. 638 */ 639 errors = 0; 640 while (!Lst_IsEmpty (targs)) { 641 gn = (GNode *) Lst_DeQueue (targs); 642 CompatMake (gn, gn); 643 644 if (gn->made == UPTODATE) { 645 printf ("`%s' is up to date.\n", gn->name); 646 } else if (gn->made == ABORTED) { 647 printf ("`%s' not remade because of errors.\n", gn->name); 648 errors += 1; 649 } 650 } 651 652 /* 653 * If the user has defined a .END target, run its commands. 654 */ 655 if (errors == 0) { 656 Lst_ForEach(ENDNode->commands, CompatRunCommand, (ClientData)gn); 657 } 658 } 659